docs: def add(self, dpos, dlen, ulen, flag, typcd, nm):
          """Add an entry to the table of contents.
  
             DPOS is data position.
             DLEN is data length.
             ULEN is the uncompressed data len.
             FLAG says if the data is compressed.
             TYPCD is the "type" of the entry (used by the C code)
             NM is the entry's name."""
          self.data.append((dpos, dlen, ulen, flag, typcd, nm))